aspTemplate : 类似 phpLib::Template 的分离层实现

类别:Asp 点击:0 评论:0 推荐:

    MVC 模式在网站架构中十分常见。它允许我们建立一个三层结构的应用程式,从代码中分离出有用的层,帮助设计师和开发者协同工作以及提高我们维护和扩展既有程式的能力。
    PHP 中有一个很著名的类库 phpLib,其中有 Template 模板类。能够很方便地实现代码分离在 ASP 中是否也可以这样做呢?当然可以,这就是 aspTemplate 的初衷。它完全实现了 phpLib Template 的全部功能,你可以象使用 phpLib Template 一样使用它,连习惯也基本不用改。:)

<%

'#######################################################################
'## NAME:  aspTemplate
'## BY:   BigHan
'## DATE:  Nov. 28, 2003
'## SITE:  http://aspTemplate.yeah.net/
'## EMAIL:  [email protected]
'##
'## (C) Copyright 2003-2004 bighan
'#######################################################################

 

Class aspTemplate

 '####
 '## name of this class
 '## var string
 '## @access    Private
 '## @see       property: Name
 '####
 Private m_strName

 '####
 '## version of this class
 '## var string
 '## @access    Private
 '## @see       property: Version
 '####
 Private m_strVersion

 '####
 '## Determines how much debugging output Template will produce.
 '## This is a bitwise mask of available debug levels:
 '## 0 = no debugging
 '## 1 = debug variable assignments
 '## 2 = debug calls to get variable
 '## 4 = debug internals (outputs all function calls with parameters).
 '##
 '## @var       int
 '## @access    Private
 '## @see       property: Debug
 '####
 Private m_intDebug

 '####
 '## The base directory from which template files are loaded.
 '##
 '## @var       string
 '## @access    private
 '## @see       property: Root, Dir; method: SetRoot, set_root
 '####
 Private m_strRoot

 '####
 '## Determines how to output variable tags with no assigned value in templates.
 '##
 '## @var       string
 '## @access    private
 '## @see       property Unknown; method: SetUnknowns, set_unknowns
 '####
 Private m_strUnknowns

 '####
 '## Determines how Template handles error conditions.
 '## "yes"      = the error is reported, then execution is halted
 '## "report"   = the error is reported, then execution continues by returning "false"
 '## "no"       = errors are silently ignored, and execution resumes reporting "false"
 '##
 '## @var       string
 '## @access    private
 '## @see       property IsHalt; method: halt
 '####
 Private m_strHaltError

 '####
 '## The last error message is retained in this variable.
 '##
 '## @var       string
 '## @access    private
 '## @see       property LastError
 '##
 Private m_strLastError

 '####
 '## Opening delimiter (usually "{")
 '##
 '## @var       string
 '## @access    private
 '## @see       property BeginTag
 '####
 Private m_strBeginTag

 '####
 '## Closing delimiter (usually "}")
 '##
 '## @var       string
 '## @access    private
 '## @see       private EndTag
 '####
 Private m_strEndTag

 '####
 '## A hash of strings forming a translation table which translates variable names
 '## into names of files containing the variable content.
 '## m_oFile.Item(varname) = "filename";
 '##
 '## @var       object
 '## @access    private
 '## @see       method: SetFile, SetFiles, set_file
 '####
 Private m_oFile

 '####
 '## Regular Expression Object
 '##
 '## @var       object
 '## @access    private
 '####
 Private m_oRegExp

 '####
 '## A hash of strings forming a translation table which translates variable names
 '## into regular expressions for themselves.
 '## m_oVarKeys.Item(varname) = "{varname}"
 '##
 '## @var       object
 '## @access    private
 '## @see       method: SetVar, SetVars, SetAppendVar, SetAppendVars, set_var
 '####
 Private m_oVarKeys

 '####
 '## A hash of strings forming a translation table which translates variable names
 '## into values for their respective varkeys.
 '## m_oVarVals.Item(varname) = "value"
 '##
 '## @var       object
 '## @access    private
 '## @see       method: SetVar, SetVars, SetAppendVar, SetAppendVars, set_var
 '####
 Private m_oVarVals

 '####
 '## get class name attribute.
 '##
 '## usage: oTemplate.Name
 '## access    public
 '##
 Public Property Get Name()
 '############################################################
  Name = m_strName
 End Property

 '####
 '## get class version attribute.
 '##
 '## usage: oTemplate.Version
 '## access    public
 '##
 Public Property Get Version()
 '############################################################
  Version = m_strVersion
 End Property

 '####
 '## get/set m_intDebug attribute.
 '##
 '## usage: oTemplate.Debug = A_intDebug
 '## access    public
 '##
 Public Property Let Debug(ByVal A_intDebug)
 '############################################################
  m_intDebug = CInt(A_intDebug)
 End Property

 Public Property Get Debug()
  Debug = m_intDebug
 End Property

 '####
 '## Sets the policy for dealing with unresolved variable names.
 '##
 '## unknowns defines what to do with undefined template variables
 '## "remove"   = remove undefined variables
 '## "comment"  = replace undefined variables with comments
 '## "keep"     = keep undefined variables
 '##
 '## Note: "comment" can cause unexpected results when the variable tag is embedded
 '## inside an HTML tag, for example a tag which is expected to be replaced with a URL.
 '##
 '## usage: oTemplate.Unknown = A_unknowns
 '##
 '## @param     A_unknowns         new value for unknowns
 '## @see       unknowns, SetUnknowns, set_unknowns
 '## @access    public
 '##
 Public Property Let Unknown(ByVal A_unknowns)
 '############################################################
  If Debug = 4 Then Response.Write "<p><b>Unknown:</b> unknown = " & A_unknowns & "</p>" & VbCrLf
  A_unknowns = LCase(A_unknowns)
  Select Case A_unknowns
   Case "keep"
    m_strUnknowns = "keep"
   Case "remove"
    m_strUnknowns = "remove"
   Case "comment"
    m_strUnknowns = "comment"
   Case Else
    m_strUnknowns = "remove"
  End Select
 End Property

 Public Property Get Unknown()
  Unknown = m_strUnknowns
 End Property

 '####
 '## Checks that root is a valid directory and if so sets this directory as the
 '## base directory from which templates are loaded by storing the value in
 '## Root. Relative filenames are prepended with the path in Root.
 '##
 '## usage: oTemplate.Root = A_root
 '##
 '## @param     A_root         string containing new template directory
 '## @see       m_strRoot, SetRoot, set_root
 '## @access    public
 '##
 Public Property Let Root(ByVal A_root)
 '############################################################
  If Debug = 4 Then Response.Write "<p><b>Root:</b> root = " & A_root & "</p>" & VbCrLf
  Dim MM_FSO
  If Len(A_root) > 0 Then
   Set MM_FSO = CreateObject("Scripting.FileSystemObject")
   If MM_FSO.FolderExists(Server.MapPath(A_root)) Then
    If Right(A_root, 1) <> "/" Then
     m_strRoot = A_root & "/"
    Else
     m_strRoot = A_root
    End If
   Else
    Call halt("The folder " & A_root & " does not exist.")
   End If
  End If
 End Property

 Public Property Get Root()
  Root = m_strRoot
 End Property

 '####
 '##
 '## alias of Root
 '##
 Public Property Let Dir(ByVal A_root)
 '############################################################
  Root = A_root
 End Property

 Public Property Get Dir()
  Dir = Root
 End Property

 '####
 '## Set/Get class m_strHaltError attribute.
 '##
 '## "yes"  = the error is reported, then execution is halted.
 '## "no"  = errors are silently ignored.
 '## "report"    = the error is reported, then execution continues.
 '##
 '## usage: oTemplate.IsHalt = A_strHalt
 '##
 '## @param     A_strHalt         new value for m_strHaltError
 '## @see       Halt
 '## @access    public
 '##
 Public Property Let IsHalt(ByVal A_strHalt)
 '############################################################
  A_strHalt = LCase(A_strHalt)
  Select Case A_strHalt
   Case "yes"
    m_strHaltError = "yes"
   Case "no"
    m_strHaltError = "no"
   Case "report"
    m_strHaltError = "report"
  End Select
 End Property

 Public Property Get IsHalt()
  IsHalt = m_strHaltError
 End Property

 '####
 '## Set/Get class m_strBeginTag attribute.
 '##
 '## Note: Don't conflict of HTML tag
 '##
 '## usage: oTemplate.BeginTag = A_tag
 '##
 '## @param     A_tag         new value for m_strBeginTag
 '## @access    public
 '##
 Public Property Let BeginTag(ByVal A_tag)
 '############################################################
  If Debug = 4 Then Response.Write "<p><b>BeginTag:</b> BeginTag = " & A_tag & "</p>" & VbCrLf
  m_strBeginTag = A_tag
 End Property

 Public Property Get BeginTag()
  BeginTag = m_strBeginTag
 End Property

 '####
 '## Set/Get class m_strEndTag attribute.
 '##
 '## Note: Don't conflict of HTML tag
 '##
 '## usage: oTemplate.EndTag = A_tag
 '##
 '## @param     A_tag         new value for m_strEndTag
 '## @access    public
 '##
 Public Property Let EndTag(ByVal A_tag)
 '############################################################
  If Debug = 4 Then Response.Write "<p><b>EndTag:</b> EndTag = " & A_tag & "</p>" & VbCrLf
  m_strEndTag = A_tag
 End Property

 Public Property Get EndTag()
  EndTag = m_strEndTag
 End Property

 '####
 '## Get class last error messages.
 '##
 '## usage: oTemplate.LastError
 '##
 '## @access    public
 '##
 Public Property Get LastError()
 '############################################################
  LastError = m_strLastError
 End Property

 '####
 '##
 '## @see Root
 '##
 Public Sub SetRoot(ByVal A_root)
 '############################################################
  Root = A_root
 End Sub

 '## @same phplib::template->set_root
 Public Sub set_root(ByVal A_root)
  Root = A_root
 End Sub

 '####
 '##
 '## @see Unknown
 '##
 Public Sub SetUnknowns(ByVal A_unknowns)
 '############################################################
  Unknown = A_unknowns
 End Sub

 '## @same phplib::template->set_root
 Public Sub set_unknowns(ByVal A_unknowns)
  Unknown = A_unknowns
 End Sub

 '####
 '## Defines a filename for the initial value of a variable.
 '##
 '## It may be passed either a varname and a file name as two strings or
 '## a hash of strings with the key being the varname and the value
 '## being the file name.
 '##
 '## The new mappings are stored in the object m_oFile.
 '## The files are not loaded yet, but only when needed.
 '##
 '##
 '## usage: oTemplate.SetFile A_varname, A_filename
 '## or
 '## usage: oTemplate.SetFile array(A_varname1, A_filename1 _
 '##           ,A_varname2, A_filename2 _
 '##           ,.... .... , ,,,. ,,,, ) _
 '##           , ""
 '## @see    SetFiles
 '## @param     A_varname      either a string containing a varname or a hash of varname/file name pairs.
 '## @param     A_filename     if varname is a string this is the filename otherwise filename is not required
 '## @access    public
 '##
 Public Sub SetFile(ByVal A_varname, ByVal A_filename)
 '############################################################
  Dim MM_strFiles
  If Not IsArray(A_varname) Then
   If Debug = 4 Then Response.Write "<p><b>SetFile:</b> (with scalar) varname = "& A_varname &", filename = "& A_filename &"</p>" & VbCrLf
   If A_filename = "" Then
    Call halt("SetFile: For varname " & A_filename & " filename is empty.")
    Exit Sub
   End If
   MM_strFiles = filename(A_filename)
   m_oFile.Add A_varname, MM_strFiles
  Else
   Call SetFiles(A_varname)
  End If
 End Sub

 '####
 '## Defines a multi-filename for the initial value of a variable.
 '##
 '## usage: oTemplate.SetFiles array(A_varname1, A_filename1 _
 '##           ,A_varname2, A_filename2 _
 '##           ,.... .... , ,,,. ,,,, )
 '## @param     array A_varname
 '## @access    public
 '## @see SetFile
 '##
 Public Sub SetFiles(ByVal A_varname)
 '############################################################
  Dim i, num
  If IsArray(A_varname) Then
   num = Ubound(A_varname)
   if ((num +1) mod 2) <> 0 Then
    Call halt("SetFiles: For varname array's element not gemination.")
    Exit Sub
   Else
    For i = 0 To num Step 2
     Call SetFile(A_varname(i), A_varname(i+1))
    Next
   End If
  Else
   Call SetFile(A_varname, "")
  End If
 End Sub

 '## @same phplib::template->set_file
 Public Sub set_file(ByVal A_varname, ByVal A_filename)
  Call SetFile(A_varname, A_filename)
 End Sub

 '####
 '## A variable $parent may contain a variable block defined by:
 '## &lt;!-- BEGIN A_varname --&gt; content &lt;!-- END A_varname --&gt;. This function removes
 '## that block from $parent and replaces it with a variable reference named $name.
 '## The block is inserted into the varkeys and varvals hashes. If A_name is
 '## omitted, it is assumed to be the same as A_varname.
 '##
 '## Blocks may be nested but care must be taken to extract the blocks in order
 '## from the innermost block to the outermost block.
 '##
 '## usage: oTemplate.SetBlock string A_parent, string A_parent, string A_name
 '##
 '## @param     A_parent       a string containing the name of the parent variable
 '## @param     A_varname      a string containing the name of the block to be extracted
 '## @param     A_name         the name of the variable in which to store the block
 '## @access    public
 '##
 Public Sub SetBlock(ByVal A_parent, ByVal A_varname, ByVal A_name)
 '############################################################
  Dim MM_String, MM_MatchString
  If Debug = 4 Then Response.Write "<p><b>SetBlock:</b> parent = " & A_parent & ", varname = " & A_varname & ", name = " & A_name & "</p>" & VbCrLf
  If Not loadfile(A_parent) Then
   Call halt("SetBlock: unable to load " & A_parent & ".")
   Exit Sub
  End If
  if A_name = "" Then A_name = A_varname
  MM_String = GetVar(A_parent)
  m_oRegExp.IgnoreCase = True
  m_oRegExp.Global = True
  m_oRegExp.Pattern = "<!--\s+BEGIN\s+(" & A_varname & ")\s+-->([\s\S.]*)<!--\s+END\s+\1\s+-->"
  Set Matches = m_oRegExp.Execute(MM_String)
  For Each Match In Matches
   MM_MatchString = Match.SubMatches(1)
   MM_String = m_oRegExp.Replace(MM_String, BeginTag & A_name & EndTag)
   Call SetVar(A_varname,MM_MatchString)
   Call SetVar(A_parent,MM_String)
  Next
 End Sub

 '## @same phplib::template->set_block
 Public Sub set_block(ByVal A_parent, ByVal A_varname, ByVal A_name)
  Call SetBlock(A_parent, A_varname, A_name)
 End Sub

 '####
 '## This functions sets the value of a variable.
 '##
 '## It may be called with either a varname and a value as two strings or an
 '## an associative array with the key being the varname and the value being
 '## the new variable value.
 '##
 '## The function inserts the new value of the variable into the $varkeys and
 '## $varvals hashes. It is not necessary for a variable to exist in these hashes
 '## before calling this function.
 '##
 '## usage: oTemplate.SetVar string A_varname, string A_value
 '## or
 '## usage: oTemplate.SetVar array( A_varname1, A_value1 _
 '##          ,A_varname2, A_value2 _
 '##          ,    ...   ,    ...    ) _
 '##          , ""     
 '##
 '## @param     A_varname      either a string containing a varname or a hash of varname/value pairs.
 '## @param     A_value        if A_varname is a string this contains the new value for the variable otherwise this parameter is ignored
 '## @access    public
 '##
 Public Sub SetVar(ByVal A_varname, ByVal A_value)
 '############################################################
  Dim MM_varname
  If Not IsArray(A_varname) Then
   If A_varname <> "" Then
   If Debug = 1 Then Response.Write "<b>SetVar:</b> (with scalar) <b>" & A_varname & "</b> = " & Server.HTMLEncode(A_value) & "<br>" & VbCrLf
    MM_varname = varname(A_varname)
    if m_oVarKeys.Exists(A_varname) Then
     m_oVarKeys.Remove A_varname
     m_oVarKeys.Add A_varname, MM_varname
    Else
     m_oVarKeys.Add A_varname, MM_varname
    End If
    If m_oVarVals.Exists(A_varname) Then
     m_oVarVals.Remove A_varname
     m_oVarVals.Add A_varname, A_value
    Else
     m_oVarVals.Add A_varname, A_value
    End If
   End If
  Else
   Call SetVars(A_varname)
  End If
 End Sub

 '####
 '## usage: oTemplate.SetVar array( A_varname1, A_value1 _
 '##          ,A_varname2, A_value2 _
 '##          ,    ...   ,    ...    )
 '## @param     A_varname      a hash of varname/value pairs.
 '## @access    public
 '## @see       SetVar
 '##
 Public Sub SetVars(ByVal A_varname)
 '############################################################
  Dim i, num
   If IsArray(A_varname) Then
    num = Ubound(A_varname)
    if ((num +1) mod 2) <> 0 Then
     Call halt("SetVars: For varname array's element not gemination.")
     Exit Sub
    Else
     For i = 0 To num Step 2
      Call SetVar(A_varname(i), A_varname(i+1))
     Next
    End If
   Else
    Call SetVar(A_varname, "")
   End If
 End Sub

 '####
 '## usage: oTemplate.SetAppendVar string A_varname, string A_value
 '## or
 '## usage: oTemplate.SetAppendVar array( A_varname1, A_value1 _
 '##          ,A_varname2, A_value2 _
 '##          ,    ...   ,    ...    ) _
 '##          , ""
 '## @param     A_varname      either a string containing a varname or a hash of varname/value pairs.
 '## @param     A_value        if A_varname is a string this contains the new value for the variable otherwise this parameter is ignored
 '## @access    public
 '## @see    SetVar
 '##
 Public Sub SetAppendVar(ByVal A_varname, ByVal A_value)
 '############################################################
  Dim MM_varname, MM_string
  If Not IsArray(A_varname) Then
   If A_varname <> "" Then
    If Debug = 1 Then Response.Write "<b>SetAppendVar:</b> (with scalar) <b>" & A_varname & "</b> = " & Server.HTMLEncode(A_value) & "<br>" & VbCrLf
    MM_varname = varname(A_varname)
    if m_oVarKeys.Exists(A_varname) Then
     m_oVarKeys.Remove A_varname
     m_oVarKeys.Add A_varname, MM_varname
    Else
     m_oVarKeys.Add A_varname, MM_varname
    End If
    If m_oVarVals.Exists(A_varname) Then
     MM_string = m_oVarVals.Item(A_varname) & A_value
     m_oVarVals.Remove A_varname
     m_oVarVals.Add A_varname, MM_string
    Else
     m_oVarVals.Add A_varname, A_value
    End If
   End If
  Else
   Call SetAppendVars(A_varname)
  End If
 End Sub

 '####
 '## usage: oTemplate.SetAppendVars array( A_varname1, A_value1 _
 '##          ,A_varname2, A_value2 _
 '##          ,    ...   ,    ...    )
 '## @param     A_varname      a hash of varname/value pairs.
 '## @access    public
 '## @see       SetVar
 '##
 Public Sub SetAppendVars(ByVal A_varname)
 '############################################################
  Dim i, num
   If IsArray(A_varname) Then
    num = Ubound(A_varname)
    if ((num +1) mod 2) <> 0 Then
     Call halt("SetVars: For varname array's element not gemination.")
     Exit Sub
    Else
     For i = 0 To num Step 2
      Call SetAppendVar(A_varname(i), A_varname(i+1))
     Next
    End If
   Else
    Call SetAppendVar(A_varname, "")
   End If
 End Sub

 '####
 '##
 '## @same phplib::template->set_var
 '##
 Public Sub set_var(ByVal A_varname, ByVal A_value, ByVal A_append)
 '############################################################
  If CBool(A_append) = True Then
   If Not IsArray(A_varname) Then
    Call SetAppendVar(A_varname, A_value)
   Else
    Call SetAppendVars(A_varname, A_value)
   End If
  Else
   If Not IsArray(A_varname) Then
    Call SetVar(A_varname, A_value)
   Else
    Call SetVars(A_varname, A_value)
   End If
  End If
 End Sub

 '####
 '## This function fills in all the variables contained within the variable named
 '## A_varname. The resulting value is returned as the function result and the
 '## original value of the variable varname is not changed. The resulting string
 '## is not "finished", that is, the unresolved variable name policy has not been
 '## applied yet.
 '##
 '## Returns: the value of the variable $varname with all variables substituted.
 '##
 '## usage: SubString(string A_varname)
 '##
 '## @param     A_varname      the name of the variable within which variables are to be substituted
 '## @access    public
 '## @return    string
 '##
 Public Function SubString(ByVal A_varname)
 '############################################################
  Dim MM_String
  If Debug = 4 Then Response.Write "<p><b>SubString:</b> varname = " & A_varname & "</p>" & VbCrLf
  If Not loadfile(A_varname) Then
   Call halt("SubString: unable to load " & A_varname & ".")
  End If
  MM_String = GetVar(A_varname)
  m_oRegExp.IgnoreCase = True
  m_oRegExp.Global = True
  m_oRegExp.Pattern = "(" & BeginTag & ")([^ \t\r\n" & EndTag &"]+)" & EndTag
  Set Matches = m_oRegExp.Execute(MM_String)
  For Each Match In Matches
   if m_oVarVals.Exists(Match.SubMatches(1)) Then
    m_oRegExp.Pattern = Match.Value
    MM_String = m_oRegExp.Replace(MM_String, m_oVarVals.Item(Match.SubMatches(1)))
   End If
  Next
  SubString = MM_String
 End Function

 '####
 '##
 '## @same phplib::template->subst
 '##
 Public Function subst(ByVal A_varname)
  subst = SubString(A_varname)
 End Function

 '####
 '## This is shorthand for print SubString(A_varname). See SubString for further
 '## details.
 '##
 '## usage: oTemplate.WriteSubString string A_varname
 '##
 '## @param     A_varname      the name of the variable within which variables are to be substituted
 '## @access    public
 '## @see       SubString
 '##
 Public Sub WriteSubString(ByVal A_varname)
 '############################################################
  If Debug = 4 Then Response.Write "<p><b>WriteSubString:</b> varname = " & A_varname & "</p>" & VbCrLf
  Response.Write SubString(A_varname)
 End Sub

 '####
 '##
 '## @same phplib::template->psubst
 '##
 Public Sub psubst(ByVal A_varname)
  Call WriteSubString(A_varname)
 End Sub

 '####
 '## The function substitutes the values of all defined variables in the variable
 '## named A_varname and stores or appends the result in the variable named A_target.
 '##
 '## It may be called with either a target and a varname as two strings or a
 '## target as a string and an array of variable names in varname.
 '##
 '## The function inserts the new value of the variable into the oVarVeys and
 '## $varvals hashes. It is not necessary for a variable to exist in these hashes
 '## before calling this function.
 '##
 '## An optional third parameter allows the value for each varname to be appended
 '## to the existing target variable instead of replacing it. The default is to
 '## replace.
 '##
 '## If A_target and A_varname are both strings, the substituted value of the
 '## variable A_varname is inserted into or appended to A_target.
 '##
 '## Returns: the last value assigned to A_target.
 '##
 '## usage: oTemplate.Parse string A_target, string A_varname, boolean A_append
 '## usage: string = oTemplate.Parse( string A_target, string A_varname, boolean A_append )
 '## or
 '## usage: oTemplate.Parse string A_target, array(A_varname1, A_varname2, ...) , boolean A_append
 '## usage: string = oTemplate.Parse( string A_target, array(A_varname1, A_varname2, ...), boolean A_append)
 '##
 '## @param     A_target      a string containing the name of the variable into which substituted $varnames are to be stored
 '## @param     A_varname     if a string, the name the name of the variable to substitute or if an array a list of variables to be substituted
 '## @param     A_append      if true, the substituted variables are appended to $target otherwise the existing value of $target is replaced
 '## @access    public
 '## @return    string
 '## @see       SubString
 '##
 '## @same phplib::template->pparse
 '##
 Public Function Parse(ByVal A_target, ByVal A_varname, ByVal A_append)
 '############################################################
  Dim MM_String, i, num
  If Not IsArray(A_varname) Then
   If Debug = 4 Then Response.Write "<p><b>Parse:</b> (with scalar) target = " & A_target & ", varname = " & A_varname & ", append = " & A_append & "</p>" & VbCrLf
   MM_String = SubString(A_varname)
   if A_append = True Then
    MM_String = GetVar(A_target) & MM_String
    Call SetVar(A_target, MM_String)
   Else
    Call SetVar(A_target, MM_String)
   End If
  Else
   num = Ubound(A_varname)
   For i = 0 To num
    If Debug = 4 Then Response.Write "<p><b>Parse:</b> (with array) target = " & A_target & ", varname = " & A_varname(i) & ", append = " & A_append & "</p>" & VbCrLf
    MM_String = SubString(A_varname(i))
    if A_append = True Then
     MM_String = GetVar(A_target) & MM_String
     Call SetVar(A_target, MM_String)
    Else
     Call SetVar(A_target, MM_String)
    End If
   Next
  End If

  If Debug = 4 Then Response.Write "<p><b>Parse:</b> completed</p>" & VbCrLf
  Parse = MM_String
 End Function

 '####
 '## This is shorthand for print Parse(...) and is functionally identical.
 '## See Parse for further details.
 '##
 '## Returns: always returns void.
 '##
 '## usage: oTemplate.Write string A_target, string A_varname
 '##
 '## @param     A_target      a string containing the name of the variable into which substituted $varnames are to be stored
 '## @param     A_varname     if a string, the name the name of the variable to substitute or if an array a list of variables to be substituted
 '## @access    public
 '## @return    void
 '## @see       Parse
 '##
 Public Sub Write(ByVal A_target, ByVal A_varname)
 '############################################################
  Dim MM_string
  If Debug = 4 Then Response.Write "<p><b>Write:</b> passing parameters to parse...</p>" & VbCrLf
  MM_string = Parse(A_target, A_varname, False)
  MM_string = Finish(MM_string)
  Response.Write MM_string
 End Sub

 '####
 '##
 '## @see Write
 '##
 Public Sub AppendWrite(ByVal A_target, ByVal A_varname)
 '############################################################
  Dim MM_string
  If Debug = 4 Then Response.Write "<p><b>Write:</b> passing parameters to parse...</p>" & VbCrLf
  MM_string = Parse(A_target, A_varname, True)
  MM_string = Finish(MM_string)
  Response.Write MM_string
 End Sub

 '####
 '##
 '## @same phplib::template->pparse
 '##
 Public Sub pparse(ByVal A_target, ByVal A_varname, ByVal A_append)
 '############################################################
  If CBool(A_append) = True Then
   Call AppendWrite(A_target, A_varname)
  Else
   Call Write(A_target, A_varname)
  End If
 End Sub

 '####
 '## This function returns an associative object of all defined variables with the
 '## name as the key and the value of the variable as the value.
 '##
 '## This is mostly useful for debugging. Also note that $this->debug can be used
 '## to echo all variable assignments as they occur and to trace execution.
 '##
 '## Returns: a hash of all defined variable values keyed by their names.
 '##
 '## usage: oTemplate.get_vars()
 '##
 '## @access    public
 '## @return    object
 '##
 Public Function GetVars()
 '############################################################
  If Debug = 4 Then Response.Write "<p><b>GetVars:</b> constructing dictionary of vars...</p>" & VbCrLf
  Set GetVars = m_oVarVals
 End Function

 '####
 '##
 '## @same phplib::template->get_vars
 '##
 Public Function get_vars()
  Set get_vars = GetVars()
 End Function

 '####
 '## This function returns the value of the variable named by A_varname.
 '## If A_varname references a file and that file has not been loaded yet, the
 '## variable will be reported as empty.
 '##
 '## When called with an array of variable names this function will return a a
 '## hash of variable values keyed by their names.
 '##
 '## Returns: a string or an array containing the value of $varname.
 '##
 '## usage: GetVar(string A_varname)
 '## or
 '## usage: GetVar(array A_varname)
 '##
 '## @param     A_varname     if a string, the name the name of the variable to get the value of, or if an array a list of variables to return the value of
 '## @access    public
 '## @return    string or object
 '##
 Public Function GetVar(ByVal A_varname)
 '############################################################
  Dim MM_String, MM_oVars, i, num
  If Not IsArray(A_varname) Then
   'MM_String = ""
   if A_varname <> "" Then
    If m_oVarVals.Exists(A_varname) Then
     MM_String = m_oVarVals.Item(A_varname)
    End If
   End If
   If Debug = 2 Then Response.Write "<b>GetVar:</b> (with scalar) <b>" & A_varname & "</b> = " & Server.HTMLEncode(MM_String) & "<br>" & VbCrLf
   GetVar = MM_String
  Else
   Set MM_oVars = CreateObject("Scripting.Dictionary")
   num = UBound(A_varname)
   For i=0 To num
    If m_oVarVals.Exists(A_varname(i)) Then
     MM_String = m_oVarVals.Item(A_varname(i))
     MM_oVars.Add A_varname(i), MM_String
    End If
    If Debug = 2 Then Response.Write "<b>GetVar:</b> (with array) <b>" & A_varname(i) & "</b> = " & Server.HTMLEncode(MM_String) & "<br>" & VbCrLf
   Next
   Set GetVar = MM_oVars
  End If
 End Function

 '####
 '##
 '## @same phplib::template->get_var
 '##
 Public Function get_var(ByVal A_varname)
  If Not IsArray(A_varname) Then
   get_var = GetVar(A_varname)
  Else
   Set get_var = GetVar(A_varname)
  End If
 End Function

 '####
 '## This functions clears the value of a variable.
 '##
 '## It may be called with either a varname as a string or an array with the
 '## values being the varnames to be cleared.
 '##
 '## The function sets the value of the variable in the oVarKeys and oVarVals
 '## hashes to "". It is not necessary for a variable to exist in these hashes
 '## before calling this function.
 '##
 '##
 '## usage: oTemplate.ClearVar string A_varname
 '## or
 '## usage: oTemplate.ClearVar array (A_varname1, A_varname2, ...)
 '##
 '## @param     $varname      either a string containing a varname or an array of varnames.
 '## @access    public
 '## @return    void
 '##
 Public Sub ClearVar(ByVal A_varname)
 '############################################################
  Dim i, num
  If Not IsArray(A_varname) Then
   If A_varname <> "" Then
    If Debug = 1 Then Response.Write "<b>clear_var:</b> (with scalar) <b>" & A_varname & "</b><br>" & VbCrLf
    Call SetVar(A_varname, "")
   End If
  Else
   num = UBound(A_varname)
   For i=0 To num
    If Debug = 1 Then Response.Write "<b>clear_var:</b> (with array) <b>" & A_varname(i) & "</b><br>" & VbCrLf
    Call SetVar(A_varname(i), "")
   Next
  End If
 End Sub

 '####
 '##
 '## @same phplib::template->clear_var
 '##
 Public Sub clear_var(ByVal A_varname)
  Call ClearVar(A_varname)
 End Sub

 '####
 '## This functions unsets a variable completely.
 '##
 '## It may be called with either a varname as a string or an array with the
 '## values being the varnames to be cleared.
 '##
 '## The function removes the variable from the oVarKeys and oVarVals hashes.
 '## It is not necessary for a variable to exist in these hashes before calling
 '## this function.
 '##
 '##
 '## usage: oTemplate.unSetVar string A_varname
 '## or
 '## usage: oTemplate.unSetVar array(A_varname1, A_varname2, ...)
 '##
 '## @param     A_varname      either a string containing a varname or an array of varnames.
 '## @access    public
 '##
 Public Sub unSetVar(ByVal A_varname)
 '############################################################
  Dim i, num
  If Not IsArray(A_varname) Then
   If A_varname <> "" Then
    If Debug = 1 Then Response.Write "<b>unSetVar:</b> (with scalar) <b>" & A_varname & "</b><br>" & VbCrLf
    If m_oVarKeys.Exists(A_varname) Then
     m_oVarKeys.Remove A_varname
    End If
    If m_oVarVals.Exists(A_varname) Then
     m_oVarVals.Remove A_varname
    End If
   End If
  Else
   num = UBound(A_varname)
   For i=0 To num
    If A_varname(i) <> "" Then
     If Debug = 1 Then Response.Write "<b>unSetVar:</b> (with array) <b>" & A_varname & "</b><br>" & VbCrLf
     If m_oVarKeys.Exists(A_varname(i)) Then
      m_oVarKeys.Remove A_varname(i)
     End If
     If m_oVarVals.Exists(A_varname(i)) Then
      m_oVarVals.Remove A_varname(i)
     End If
    End If
   Next
  End If
 End Sub

 '####
 '##
 '## @same phplib::template->unset_var
 '##
 Public Sub unset_var(ByVal A_varname)
  Call unSetVar(A_varname)
 End Sub


 '####
 '## This function returns a hash of unresolved variable names in A_varname, keyed
 '## by their names.
 '##
 '## Returns: a hash of varname/varname pairs or false on error.
 '##
 '## usage: GetUndefined(string A_varname)
 '##
 '## @param     A_varname     a string containing the name the name of the variable to scan for unresolved variables
 '## @access    public
 '## @return    array
 '##
 Public Function GetUndefined(ByVal A_varname)
 '############################################################
  Dim MM_String, MM_result
  If Debug = 4 Then Response.Write "<p><b>GetUndefined:</b> varname = " & A_varname & "</p>" & VbCrLf
  If Not loadfile(A_varname) Then
   Call halt("get_undefined: unable to load " & A_varname & ".")
   GetUndefined = False
   Exit Function
  End If
  MM_String = GetVar(A_varname)
  'Set MM_result = CreateObject("Scripting.Dictionary")
  m_oRegExp.IgnoreCase = True
  m_oRegExp.Global = True
  m_oRegExp.Pattern = "(" & BeginTag & ")([^ \t\r\n" & EndTag &"]+)" & EndTag
  Set Matches = m_oRegExp.Execute(MM_String)
  i = 0
  For Each Match In Matches
   if Not m_oVarVals.Exists(Match.SubMatches(1)) Then
    If Debug = 4 Then Response.Write "<p><b>get_undefined:</b> undefined: " & SubMatches(1) & "</p>" & VbCrLf
    'MM_result.Add Match.SubMatches(1), Match.SubMatches(1)
    MM_result(i) = Match.SubMatches(1)
    i = i + 1
   End If
  Next
  'if MM_result.Count > 0 Then
  ' Set GetUndefined = MM_result
  If IsArray(MM_result) Then
   GetUndefined = MM_result
  Else
   GetUndefined = False
  End If
 End Function

 '####
 '##
 '## @same phplib::template->get_undefined
 '##
 Public Function get_undefined(ByVal A_varname)
 '############################################################
  get_undefined = GetUndefined
 End Function

 '============================================================
 '方法: finish (兼容 phplib)
 '目的: 检查完成
 '参数: A_varname - string
 '返回: string
 '############################################################
 Public Function Finish(ByVal A_String)
 '############################################################
  Dim MM_String
  Select Case Unknown
   case "keep"
    MM_String = A_String
   case "remove"
    m_oRegExp.IgnoreCase = True
    m_oRegExp.Global = True
    m_oRegExp.Pattern = "(" & BeginTag & ")([^ \t\r\n" & EndTag &"]+)" & EndTag
    MM_String = m_oRegExp.Replace(A_String, "")
   case "comment"
    m_oRegExp.IgnoreCase = True
    m_oRegExp.Global = True
    m_oRegExp.Pattern = "(" & BeginTag & ")([^ \t\r\n" & EndTag &"]+)" & EndTag
    Set Matches = m_oRegExp.Execute(A_String)
    For Each Match In Matches
     MM_String = m_oRegExp.Replace(A_String, "<!-- Template variable " & Match.SubMatches(1) &" undefined -->")
    Next
  End Select
  Finish = MM_String
 End Function


 '####
 '## This function returns the finished version of the value of the variable named
 '## by $varname. That is, the policy regarding unresolved variable names will be
 '## applied to the variable A_varname and the result returned.
 '##
 '## Returns: a finished string derived from the variable A_varname.
 '##
 '## usage: oTemplate.GetVariable(string A_varname)
 '##
 '## @param     A_varname     a string containing the name of the variable to finish
 '## @access    public
 '## @return    string
 '## @see       SetUnknowns
 '## @see       Finish
 '##
 Public Function GetVariable(ByVal A_varname)
 '############################################################
  GetVariable = Finish(GetVar(A_varname))
 End Function

 'Public Function get(ByVal A_varname)
 '冲突不支持
 'End Function

 '####
 '## This function prints the finished version of the value of the variable named
 '## by $varname. That is, the policy regarding unresolved variable names will be
 '## applied to the variable A_varname then it will be printed.
 '##
 '## usage: oTemplate.WriteVariable string A_varname
 '##
 '## @param     A_varname     a string containing the name of the variable to finish and print
 '## @access    public
 '## @see       SetUnknowns
 '## @see       Finish
 '##
 Public Sub WriteVariable(ByVal A_varname)
 '############################################################
  Response.Write Finish(GetVal(A_varname))
 End Sub

 '####
 '##
 '## @see WriteVariable
 '## @same phplib::template->p
 '##
 Public Sub p(ByVal A_varname)
  Call WriteVariable(A_varname)
 End Sub

 '####
 '## When called with a relative pathname, this function will return the pathname
 '## with Root prepended. Absolute pathnames are returned unchanged.
 '##
 '## Returns: a string containing an absolute pathname.
 '##
 '## usage: filename(string A_filename)
 '##
 '## @param     A_filename    a string containing a filename
 '## @access    private
 '## @return    string
 '## @see       Root, SetRoot
 '##
 '## @same phplib::template->filename
 '##
 Private Function filename(ByVal A_filename)
 '############################################################
  Dim MM_FSO
  If Debug = 4 Then Response.Write "<p><b>filename:</b> filename = " & A_filename & "</p>" & VbCrLf
  'If Len(A_filename) > 0 Then
   Set MM_FSO = CreateObject("Scripting.FileSystemObject")
   If Left(A_filename, 1) = "/" Then
    A_filename = Right(A_filename, len(A_filename) - 1)
   End If
   A_filename = Root & A_filename
   A_filename = Server.MapPath(A_filename)
   If Not MM_FSO.FileExists(A_filename) Then
    Call halt("filename: file " & A_filename & " does not exist.")
   End If
   filename = A_filename
  'Else
  ' Call halt("filename: filename is empty")
  'End If
 End Function

 '####
 '## If a variable's value is undefined and the variable has a filename stored in
 '## ofile.Item(A_varname) then the backing file will be loaded and the file's
 '## contents will be assigned as the variable's value.
 '##
 '## Note that the behaviour of this function changed slightly after the 7.2d
 '## release. Where previously a variable was reloaded from file if the value
 '## was empty, now this is not done. This allows a variable to be loaded then
 '## set to "", and also prevents attempts to load empty variables. Files are
 '## now only loaded if oVarVals.Item(A_varname) is unset.
 '##
 '## Returns: true on success, false on error.
 '##
 '## usage: loadfile(string A_varname)
 '##
 '## @param     A_varname    a string containing the name of a variable to load
 '## @access    private
 '## @return    boolean
 '## @see       SetFile, SetFiles
 '##
 '## @same phplib::template->loadfile
 '##
 Private Function loadfile(ByVal A_varname)
 '############################################################
  Dim MM_FSO, MM_oFile, MM_filename, MM_FileSting, MM_bool
  If Debug = 4 Then Response.Write "<p><b>loadfile:</b> varname = " & A_varname & "</p>" & VbCrLf
  MM_bool = true
  If Not m_oFile.Exists(A_varname) Then
   loadfile = MM_bool
   If Debug = 4 Then Response.Write "<p><b>loadfile:</b> varname " & A_varname & " does not reference a file</p>" & VbCrLf
   Exit Function
  End If
  If m_oVarVals.Exists(A_varname) Then
   loadfile = MM_bool
   If Debug = 4 Then Response.Write "<p><b>loadfile:</b> varname " & A_varname & " is already loaded</p>" & VbCrLf
   Exit Function
  End If
  MM_filename = m_oFile.Item(A_varname)
  Set MM_FSO = CreateObject("Scripting.FileSystemObject")
  Set MM_oFile = MM_FSO.OpenTextFile(MM_filename)
  MM_FileSting = MM_oFile.ReadAll
  'MM_FileSting = Trim(MM_FileSting)
  If MM_FileSting = "" Then
   MM_bool = false
   Call halt("loadfile: While loading " & A_varname & ", " & MM_filename & " does not exist or is empty.")
  Else
   If Debug = 4 Then Response.Write "<b>loadfile:</b> loaded " & MM_filename & " into " & A_varname & "<br>" & VbCrLf
   Call SetVar(A_varname, MM_FileSting)
  End If
  MM_oFile.Close
  Set MM_oFile = Nothing
  set FSO = nothing
  loadfile = MM_bool
 End Function

 '####
 '## This function will construct a regexp for a given variable name with any
 '## special chars quoted.
 '##
 '## Returns: a string containing an escaped variable name.
 '##
 '## usage: varname(string A_varname)
 '##
 '## @param     A_varname    a string containing a variable name
 '## @access    private
 '## @return    string
 '## @same phplib::template->varname
 '##
 Private Function varname(ByVal A_varname)
 '############################################################
  varname = BeginTag & A_varname & EndTag
 End Function

 '####
 '## This function is called whenever an error occurs and will handle the error
 '## according to the policy defined in IsHalt. Additionally the
 '## error message will be saved in m_strLastError.
 '##
 '## Returns: always returns false.
 '##
 '## usage: halt(string A_message)
 '##
 '## @param     $msg         a string containing an error message
 '## @access    private
 '## @return    void
 '## @see       IsHalt
 '##
 Private Sub halt(ByVal A_message)
 '############################################################
  m_strLastError = A_message
  If IsHalt <> "no" Then Call haltmsg(A_message)
  If IsHalt = "yes" Then
   Response.Write "<b>Halted.</b>"
   Response.End
  End If
 End Sub

 '####
 '## This function prints an error message.
 '## It can be overridden by your subclass of Template. It will be called with an
 '## error message to display.
 '##
 '## usage: haltmsg(string A_message)
 '##
 '## @param     A_message         a string containing the error message to display
 '## @access    public
 '## @return    void
 '## @see       halt
 '##
 Public Sub haltmsg(ByVal A_message)
 '############################################################
  Response.Write "<b>Template Error:</b>" & A_message & "<br>"
 End Sub

 '####
 '## Class constructor, set class default attributes, you can change it
 '## @see Property Let Debug
 '## @see Property Let Unknown
 '## @see Property Let IsHalt
 '## @see Property Let BeginTag
 '## @see Property Let EndTag
 '####
 Private Sub class_Initialize
  Debug = 0
  Unknown = "remove"
  IsHalt = "yes"
  m_strLastError = ""
  BeginTag = "{"
  EndTag = "}"
  m_strRoot = "templates/"
  Set m_oFile = CreateObject("Scripting.Dictionary")
  Set m_oVarKeys = CreateObject("Scripting.Dictionary")
  Set m_oVarVals = CreateObject("Scripting.Dictionary")
  Set m_oRegExp = New RegExp

  m_strName = "aspTemplate"
  m_strVersion = "1.0.0"

  If Debug = 4 Then Response.Write "<p><b>Template:</b> root = " & m_strRoot & ", unknowns = " & Unknown & "</p>" & VbCrLf

 End Sub

 '####
 '## Class destructor, free memory.
 '####
 Private Sub class_Terminate
  Set m_oFile = Nothing
  Set m_oVarKeys = Nothing
  Set m_oVarVals = Nothing
  Set m_oRegExp = Nothing
 End Sub

End Class

%>

 

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